1, decimal times integer-important: understand the arithmetic of decimal times integer.

2. Decimal Multiply Decimal-Key Points: Decimal Multiply Decimal Calculation Method.

3. The divisor of the product-the key point: the product is the divisor of the decimal. Difficulty: approximate value according to the actual situation.

4. Multiplication, multiplication and addition, multiplication and subtraction-key points: decimal multiplication, multiplication and addition, multiplication and subtraction. Difficulties: guide students to understand the problem-solving ideas that appear in problem solving.

5. The operation law of integer multiplication is extended to decimal-important: understanding the operation law of integer multiplication is also applicable to decimal multiplication.

Unit 2: Fractional division.

1, decimal divided by integer-key point: calculation method of decimal divided by integer. Difficulty: Let students understand how to determine the decimal point of quotient.

2, a number divided by a decimal-the key: master the divisor is the calculation method of decimal division.

3. The divisor of the quotient-Important: When calculating the divisor of the quotient, the decimal place of the quotient should be one more than the required decimal place.

4. Cyclic decimals-Key points: Understand the meaning of cyclic decimals and simply read and write cyclic decimals. Difficulties: How to judge whether the quotient of division is a cyclic decimal?

5. Problem solving-key point: train students to solve problems and let them master the basic steps of analyzing problems.

Unit 3: Observing objects.

Observe the object (1)- Important: When you observe the object from different positions, the shape you see is different.

Observing the object (2)-Key point: correctly identify the three-dimensional combination figure observed from the top, side and front.

Unit 4: Simple Equation.

1, using letters to represent numbers-key points: using letters to represent numbers, algorithms and formulas.

2. Use the formula with letters to express quantity and quantity relationship-key point: use the formula with letters to express quantity.

3, the meaning of the equation-the key: a preliminary understanding of the meaning of the equation.

4. Solving equations-key point: understanding the method of understanding simple equations by using balance elements.

5. Slightly complicated equation (1)- Emphasis: Students independently explore ways to solve more complicated application problems through column equations.

6. Slightly complicated equation (2)-Focus: analyze the quantitative relationship. Difficulties: column equation and solution equation.

7. Slightly complicated equation (3)-Key point: set the unknown quantity correctly, find out the equation of equal relationship and solve the problem.

Unit 5: The area of polygon.

1, area of parallelogram-key point: By exploring, understanding and mastering the calculation formula of parallelogram area, students can calculate the area of parallelogram.

2. The area of triangle-the key: understand the derivation process of the triangle area formula and calculate it according to the formula.

3. Trapezoidal area-key point: In my independent exploration, I experienced the process of deriving the formula of trapezoidal area.

4. the area of the combination chart-key: master the method of calculating the combination chart.

Unit 6: Statistics and Possibility.

1, possibility-key point: understand and grasp the meaning of possibility, and express possibility with scores.

2. Median-Focus: Understand the meaning of the median, master the method of finding the median, and choose the appropriate statistics according to the specific situation of the data and the problems to be analyzed.

3, shop a shop-the key: know the secret shop, know which graphics can be secret shop.

Unit 7: Mathematics Wide Angle.

1, mathematical wide angle (1)- key point: learn to find information through various channels, analyze the collected information, and discover the information reflected by digital coding in life.

2. Mathematics Wide Angle (2)- Key point: enable students to design codes according to actual needs by using laws, code all the students and number the books in the class with what they have learned.

Unit 8: General review.

Key points: 1, decimal multiplication and division operation, decimal multiplication and division mixed operation.

2. Solve simple equations.

3. Application problems (arithmetic method and equation method).

4. Calculation method of polygon area.